import { Command } from './Command.js';

/**
 * @param editor Editor
 * @param object THREE.Object3D
 * @param newParent THREE.Object3D
 * @param newBefore THREE.Object3D
 * @constructor
 */
class MoveObjectCommand extends Command {

    constructor( editor, object, newParent, newBefore ) {

        super( editor );

        this.type = 'MoveObjectCommand';
        this.name = 'Move Object';

        this.object = object;
        this.oldParent = ( object !== undefined ) ? object.parent : undefined;
        this.oldIndex = ( this.oldParent !== undefined ) ? this.oldParent.children.indexOf( this.object ) : undefined;
        this.newParent = newParent;

        if ( newBefore !== undefined ) {

            this.newIndex = ( newParent !== undefined ) ? newParent.children.indexOf( newBefore ) : undefined;

        } else {

            this.newIndex = ( newParent !== undefined ) ? newParent.children.length : undefined;

        }

        if ( this.oldParent === this.newParent && this.newIndex > this.oldIndex ) {

            this.newIndex --;

        }

        this.newBefore = newBefore;

    }

    execute() {

        this.oldParent.remove( this.object );

        const children = this.newParent.children;
        children.splice( this.newIndex, 0, this.object );
        this.object.parent = this.newParent;

        this.object.dispatchEvent( { type: 'added' } );
        this.editor.signals.sceneGraphChanged.dispatch();

    }

    undo() {

        this.newParent.remove( this.object );

        const children = this.oldParent.children;
        children.splice( this.oldIndex, 0, this.object );
        this.object.parent = this.oldParent;

        this.object.dispatchEvent( { type: 'added' } );
        this.editor.signals.sceneGraphChanged.dispatch();

    }

    toJSON() {

        const output = super.toJSON( this );

        output.objectUuid = this.object.uuid;
        output.newParentUuid = this.newParent.uuid;
        output.oldParentUuid = this.oldParent.uuid;
        output.newIndex = this.newIndex;
        output.oldIndex = this.oldIndex;

        return output;

    }

    fromJSON( json ) {

        super.fromJSON( json );

        this.object = this.editor.objectByUuid( json.objectUuid );
        this.oldParent = this.editor.objectByUuid( json.oldParentUuid );
        if ( this.oldParent === undefined ) {

            this.oldParent = this.editor.scene;

        }

        this.newParent = this.editor.objectByUuid( json.newParentUuid );

        if ( this.newParent === undefined ) {

            this.newParent = this.editor.scene;

        }

        this.newIndex = json.newIndex;
        this.oldIndex = json.oldIndex;

    }

}

export { MoveObjectCommand };
